Merge remote-tracking branch 'refs/remotes/Cyan4973/dev070' into dev070

# Conflicts:
#	.gitignore
#	lib/decompress/zstd_decompress.c
#	programs/zbufftest.c

lib/common/zstd_static.h

@@ -87,8 +87,9 @@ typedef struct {
 } ZSTD_compressionParameters;
 
 typedef struct {
-    U32 contentSizeFlag;   /* 1: content size will be in frame header (if known). */
-    U32 noDictIDFlag;      /* 1: no dict ID will be saved into frame header (if dictionary compression) */
+    U32 contentSizeFlag;  /* 1: content size will be in frame header (if known). */
+    U32 checksumFlag;     /* 1: will generate a 22-bits checksum at end of frame, to be used for error detection by decompressor */
+    U32 noDictIDFlag;     /* 1: no dict ID will be saved into frame header (if dictionary compression) */
 } ZSTD_frameParameters;
 
 typedef struct {
@@ -197,6 +198,7 @@ typedef struct {
     U64 frameContentSize;
     U32 windowLog;
     U32 dictID;
+    U32 checksumFlag;
 } ZSTD_frameParams;
 
 #define ZSTD_FRAMEHEADERSIZE_MAX 18    /* for static allocation */